SOLUTION: Sol is twice as old as Lee. The sum of their ages seven years ago was 13. How old are they now?

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Question 321921: Sol is twice as old as Lee. The sum of their ages seven years ago was 13. How old are they now?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let lee be x years
Sol is 2x years
..
7 years ago
Lee was x-7 years
Sol was 2x-7 years
Their sum was 13
x-7+2x-7=13
3x=13+14
3x=27
x=9
Lee is 9 years
Sol is 2x = 18 years